Improvement in electro-magnetic stop-motions for spinning-machines



' ;H.;A. OHAPIN. I Eleotro-MagnetioStop-Motion for Spinning-Machines.

No. 211.222. Patented Jan. 7,1879.

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UNITED STATES PATENT OFFICE;

HENRY A. GHAPIN, or SPRINGFIELD,MASSACHUSETTS.

IMPROVEMENT lN ELECTRO-MAGNETlC STOP-MOTIONS FOR SPINNING-MACHINES.

Specification forming part of Letters Patent No. 211,222, dated January'7, 1879; application filed August 2, 1877.

annexed specification and in the accompany-- ing drawing."

My invention has for its object the stopping of the Spindle andfeed-rollers of a spinning or twisting frame when the yarn breaksbetween the feed-rollers and spindle, or when in ringspinning a travelerflies off from or out of a ring, or when, from any other cause, theproper tension upon the yarn between the feed-rollers and spindle isinterrupted.

This invention is somewhat in the nature of an improvement upon mypatent ofNovember 7, 1876,- for improvement in electro-magneticstop-motions for spinning and twisting machinery, and this improvementmay be employed in conjunction with the stop-operating devices set forthin said patent, or may be with advantage employed on machines stoppedwholly by electromagnetic action.

In spinnin g-machines heretofore constructed with electromagneticstopmotions the circuitconnecting stop-fingers have been arranged to lieupon the separate strands or yarns above the feed-rollers before theyhad been joined together and twisted into one strand below thefeed-rollers. In the latter case any breakage of any one of the saidseparate strands would cause the spindle and feed-rollers to stop but ifthe material united and being twisted below the feed-rollers becamebroken, or from any cause was running slack, therebyinjuring the yarnand causing loss, neither the feed-rollers nor spindle would stop, andthe feed-rollers would continue to draw the strands from the bobbins onthe bobbin-board, thereby keeping the stop-fingers from acting to stopthe machine, and meanwhile waste would be made below the feed-rollers.

My improvement provides an effective remedy for the above defect byplacing a circuitconnecting stop-finger between the feed-rollers andspindle, which may act simply to stop the machine, or may at the sametime serve also as a substitute for the usual eye-piece employed to keepthe yarn in a central position over the center of the spindle.

In the drawing is shown an end elevation of a spinning-frame, showingthe manner in which my improvement is applied and its operative relationto the feed-rollers, yarn, and spindle, and in which A is the frame ofthe machine; a, the bobbin-board; a, a spool from which yarnis drawn. 0,is a pressure or upper roller. cl is the feedroller. H is the usualeye-board of a spinningframe. I) is a circuit-connecting stop-finger,made of wire, with an eye bent on its outward end. F is a metallicfulcrum, upon which finger b swings. h is a connecting-bar, upon whichthe rear end of finger b may fall. 5 01 are two line-wires, runningalong the back side of bobbin-board a, and connecting with a battery. Kis a connecting-wire from bar h to line-wire i. a is a connecting-wirefrom fulcrum F to intermediate stop devices between said fulcrum andline-wire i. D is a bobbin on the spindle, and f is the yarn. The fingerb, in dotted lines, shows its position when its eye end rises up,allowing its rear end to rest on bar h, and thus make acircuit-connection.

The drum for driving the spindle and the devices for running thefeed-rollers may be of the usual construction.

The operation of my improvement is as fol lows, viz: The yarn f is ledfrom bobbin (1/ down between pressure-roller c and feed-roller (Ithrough the eye in finger b, and thence down to the bobbin D on thespindle.

When the frame is started up a certain amount of tension is producedupon that portion. of the yarn between the rollers and the spindle.

It will be observed that the face of feedroller cl sits back from thevertical line of the sides of bobbin D on the spindle, while the eye onthe end of finger b is over the center of the spindle, or nearly so, sothat the yarn f, in passing from between the rollers, takes at first asomewhat oblique direction to and through the eye in the finger b, andthence downward to the bobbin D on the spindle. The draw of the yarnthus obliquely against the eye in finger b causes the eye end of thefinger to be depressed, and so lift its rear end from contact with barh; but should the yarn break between the roller d and the bobbin D, orfrom some cause slack up, as hereinbefore set forth, then, the eye endof finger I) being freed from the draw of the yarn, the finger willswing on its fulcrum F, bringing its rear end into contact with bar h,and this, through connectingwires K and n, establishes magneticconnection between the line-wires -23 i, the current passing through theproper stop devices, hereinbefore mentioned, whereby they operate tostop the feed-rolls and spindle, and thus pre vent waste of material.

The finger b may be used with or without the usual eyewire inserted inthe front edge of eye-board H, as for ordinary work it is

